Features " Versatile, durable work vest with rib knit collar, riveted and taped hand pockets made from 900 denier ripstop polyester and an all-metal zipper " Optimised fit maximizes heating performance without constricting movement or limiting ability to layer underneath / over " Superior runtime - up to 8 hours of heat on a single battery charge (2.0 Ah) " Multiple heating zones - 3 sewn in carbon fibre heating zones distributes heat to core body areas " Easy touch heat controller - 3 heat settings: High, Medium, Low " M12™ battery holder - concealed battery pocket for minimal user interference " Water and wind resistant - provides comfort and durability in harsh environments " Machine washable and dryable